Television – Special applications – With endoscope
Patent
1993-05-25
1995-05-16
Groody, James J.
Television
Special applications
With endoscope
348 65, H04N 718
Patent
active
054165113
ABSTRACT:
The present invention is intended to enable the change of the operating mode of an observation apparatus of a video system between a fluorescent observation mode and an ordinary observation mode and to enable the observation apparatus to reproduce a clear image for observation. The observation apparatus in accordance with the present invention uses a principle that an image pickup system provides three color signals, namely, R-, G- and B-signals. The image pickup system of the observation apparatus is provided with an illuminating light selecting means for selectively using light in a specified wavelength region as illuminating light, and a color signal selecting means for selectively providing the color signals. When the specified wavelength region is the visible region, at least the color signals in a wavelength region including the specified wavelength region including the illuminating light are cut off. When the specified wavelength region is an ultraviolet region, the color signals in a wavelength region including the main wavelength region including fluorescent light emitted by excitation by the illuminating light in the ultraviolet region are provided selectively.
REFERENCES:
patent: 4742388 (1988-05-01), Cooper et al.
patent: 4974094 (1990-11-01), Morito
patent: 5001556 (1991-03-01), Nakamura et al.
patent: 5092331 (1992-03-01), Nakamura et al.
patent: 5202758 (1993-04-01), Tamburrino
United States Statutory Invention Registration No. H881, published Jan. 1, 1991, "TV Seeker Electronic Color Filter," Harold H. Holt, inventor.
Hirai Masanori
Ishikawa Seiji
Murakami Hajime
Yamamoto Masao
Cohen Cheryl
Groody James J.
Mitsubishi Chemical Corporation
Scalar Co.
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